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Sawdust biochar application to rice paddy field: reduced nitrogen loss in floodwater accompanied with increased NH3 volatilization

文献类型： 外文期刊

作者： Feng, Yanfang 1 ; Sun, Haijun 2 ; Xue, Lihong 1 ; Wang, Yueman 1 ; Yang, Linzhang 1 ; Shi, Weiming 2 ; Xing, Baoshan 3 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China

2.Foshan Univ, Sch Food Sci & Engn, Foshan 528000, Peoples R China

3.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA

关键词： Sawdust biochar; Non-point source pollution; Nitrogen; Floodwater; NH3 volatilization

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2018 年 25 卷 9 期

页码：

收录情况： SCI

摘要： Sawdust biochar (SDB) was for the first time applied to rice paddy field to evaluate its effects on potential nitrogen (N) runoff and ammonia (NH3) volatilization losses in a soil column experimental system. Results showed that total N concentration of surface floodwater under SDB treatments was reduced by 7.29-35.16, 16.34-32.35, and 12.21-28.12% after three split N fertilizations, respectively. Particularly, NH4+-N was decreased by 11.84-27.08, 14.29-36.50, and 2.97-19.64%, respectively. However, SDB addition has no significant influence on NO3--N concentration. Meanwhile, SDB application increased NH4+-N and total N content of top (0-15 cm) soil. Furthermore, these SDB-induced influences were more pronounced for 3 wt% SDB treatments. SDB treatments recorded 3.56-5.78 kg ha(-1) higher NH3 volatilization than urea control treatment, which was attributed to the elevated pH values of floodwater and top soil induced by SDB. Fortunately, the yield-scale NH3 volatilization was not increased dramatically.

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